1st November Storm Approaching

November 3, 2008

IR2MFR As Rob Martin mentioned in the addendum to the previous post, a nice little system moves inland today and tonight.  A surface low offshore deepens nicely as it tracks across Oregon the next 18 hours or so.  The GFS is farther north with the low moving from SW Oregon to around Pasco.  The NAM stays in the southern half of the state.  What captured my interest this morning was the satellite imagery and the position of the low.  I think we're going to have a period of moderate to heavy rainfall during the evening across N.W. Oregon.  as the northwest sector of the storm moves overhead.  I can see .50" or so falling in just 3-5 hours.  Strong northwesterly flow developing at the same time should really dump heavy rain on the foothills of the Cascades and snow IN the Cascades as well.  Government Camp may be very messy by 10pm or so, and Timberline should be blizzardlike up there at 6,000'. By morning the snow level should be around 3,000' or a little below.

Depending on how much the low deepens, it's also going to get quite windy through Central & North Central Oregon, along with the east end of the Columbia River Gorge as well.  That will be from strong west and southwest wind pulling in behind the low…Mark Nelsen